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Industrial weaving yarn manufacturers explain the main effects of yarn twist direction on fabric properties?

Yarn twist direction refers to the twist direction of yarn twist back. If the fiber is inclined from the upper left to the lower right after twisting, it is S twist. If the fiber is inclined from the upper right to the lower left after twisting, it is Z twist. The twist direction of yarn has an influence on the surface gloss, the clarity of fabric grain, and the feel and thickness of fabric. When the matching of warp and weft yarns with different twist directions is adopted, as shown in Figure 2-2 (a), the warp yarns are Z-twist and the weft yarns are S-twist for interweaving, and the fibers at the contact of the warp and weft yarns are crossed with each other, so the entanglement between the warp and weft yarns is poor and easy to slip. The weave point of the fabric with this twist direction is prominent due to large bending, the grain is clear, and the handle is loose, thick and soft. The thickness of the fabric is thicker than that with the same twist direction. In the process of printing and dyeing, the color absorption is better, Dyeing is easy to be uniform. However, the tension of the fabric falling from the loom decreases, and due to the tendency of untwisting the yarn, it is easy to produce the phenomenon of curling, especially for thin fabrics. The twist directions of warp and weft yarns are the same, as shown in Figure 2-2 (b) (both warp and weft yarns are Z-twist), but the situation is opposite to the above.








If the warp and weft yarns in the fabric are twisted in different directions, the fibers on the surface of the fabric have the same oblique direction, and the reflection direction of light is also the same, so the gloss of the fabric is good. While figure 2-2 (b) shows that the twist directions of the warp and weft yarns are the same, then the situation is opposite. The fiber oblique directions on the surface of the fabric are perpendicular to each other, the reflection of the fabric to light is scattering effect, and the gloss of the fabric is soft.


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